5 • Troubleshooting and maintenance | Model 6511RC User Manual |
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Figure 67. Section Trace parameters on the SDH Configuration page
3.For Section Trace Monitor, select sectionTraceEnable(1) from the drop-down menu.
4.For the Section Trace message string, enter the alphanumeric string your connected SDH network uses for the Section Trace Message String in the SDH frame.
Note Section trace is used for 16-byte and 64-byte section trace messages. For 1-byte and 64-byte trace messages, the J0 byte is used and the value of section trace is ignored.
5.For Section Trace Msg Len, from the drop-down menu, select the value used by the SDH network your Matrix Switch is connected to: either 1, 16, or 64-byte trace messages.
6.For Section Trace J0 Byte enter the value your connected SDH network uses for the J0 byte in the SDH frame.
Note J0 is used only for 1-byte section trace messages. For 16-byte and 64- byte trace messages, the trace message string is used and the value of J0 is ignored.
7.Click the Submit button to save your work into operating memory (volatile DRAM) and activate the new parameter values.
Path trace
The path trace function verifies path connectivity between the two path-terminating nodes.The two SDH path-terminating devices perform the trace over the STM-1 media segment between them. When Path Trace is enabled, the SDH frame carries the Path Trace message in either the J1 byte or the path trace string. The value you define for Path Trace Message Length determines which field will carry the Path Trace message, as specified below:
•1-byte Trace Message Length— use the J1 byte for trace messaging, and ignore the contents of path trace string. The value of J0 may be any positive integer in the range of 0 to 255.
•16-byte Trace Message Length — use the path trace string for path trace messaging, and ignore the con- tents of J1. The value of path trace string may be any alphanumeric text string up to 15 characters long. The 16-byte field includes CRC-7 in the 16th byte.
